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-rw-r--r--crypto/aead.c14
-rw-r--r--include/crypto/aead.h13
2 files changed, 27 insertions, 0 deletions
diff --git a/crypto/aead.c b/crypto/aead.c
index 8cdea89909cd..4bab3cff3578 100644
--- a/crypto/aead.c
+++ b/crypto/aead.c
@@ -174,6 +174,14 @@ static int crypto_old_aead_init_tfm(struct crypto_tfm *tfm)
return 0;
}
+static void crypto_aead_exit_tfm(struct crypto_tfm *tfm)
+{
+ struct crypto_aead *aead = __crypto_aead_cast(tfm);
+ struct aead_alg *alg = crypto_aead_alg(aead);
+
+ alg->exit(aead);
+}
+
static int crypto_aead_init_tfm(struct crypto_tfm *tfm)
{
struct crypto_aead *aead = __crypto_aead_cast(tfm);
@@ -189,6 +197,12 @@ static int crypto_aead_init_tfm(struct crypto_tfm *tfm)
aead->child = __crypto_aead_cast(tfm);
aead->authsize = alg->maxauthsize;
+ if (alg->exit)
+ aead->base.exit = crypto_aead_exit_tfm;
+
+ if (alg->init)
+ return alg->init(aead);
+
return 0;
}
diff --git a/include/crypto/aead.h b/include/crypto/aead.h
index 1a273bc5656c..5cb0066be30b 100644
--- a/include/crypto/aead.h
+++ b/include/crypto/aead.h
@@ -109,6 +109,17 @@ struct aead_givcrypt_request {
* @decrypt: see struct ablkcipher_alg
* @geniv: see struct ablkcipher_alg
* @ivsize: see struct ablkcipher_alg
+ * @init: Initialize the cryptographic transformation object. This function
+ * is used to initialize the cryptographic transformation object.
+ * This function is called only once at the instantiation time, right
+ * after the transformation context was allocated. In case the
+ * cryptographic hardware has some special requirements which need to
+ * be handled by software, this function shall check for the precise
+ * requirement of the transformation and put any software fallbacks
+ * in place.
+ * @exit: Deinitialize the cryptographic transformation object. This is a
+ * counterpart to @init, used to remove various changes set in
+ * @init.
*
* All fields except @ivsize is mandatory and must be filled.
*/
@@ -118,6 +129,8 @@ struct aead_alg {
int (*setauthsize)(struct crypto_aead *tfm, unsigned int authsize);
int (*encrypt)(struct aead_request *req);
int (*decrypt)(struct aead_request *req);
+ int (*init)(struct crypto_aead *tfm);
+ void (*exit)(struct crypto_aead *tfm);
const char *geniv;